/*
 * Copyright 2010 Henry Coles
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and limitations under the License.
 */
package org.pitest.junit;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.pitest.classinfo.ClassInfo;
import org.pitest.functional.Option;
import org.pitest.functional.predicate.Predicate;

abstract class TestInfo {

  public static boolean isWithinATestClass(final ClassInfo clazz) {

    final Option<ClassInfo> outerClass = clazz.getOuterClass();
    return isATest(clazz)
        || (outerClass.hasSome() && isATest(outerClass.value()));

  }

  private static boolean isATest(final ClassInfo clazz) {
    return isJUnit3Test(clazz) || isJUnit4Test(clazz)
        || isATest(clazz.getSuperClass());
  }

  private static boolean isATest(final Option<ClassInfo> clazz) {
    if (clazz.hasSome()) {
      return isATest(clazz.value());
    }
    return false;
  }

  public static Predicate<ClassInfo> isATest() {
    return new Predicate<ClassInfo>() {
      public Boolean apply(final ClassInfo clazz) {
        return isATest(clazz);
      }

    };
  }

  private static boolean isJUnit3Test(final ClassInfo clazz) {
    return clazz.descendsFrom(junit.framework.TestCase.class)
        || clazz.descendsFrom(junit.framework.TestSuite.class);
  }

  private static boolean isJUnit4Test(final ClassInfo clazz) {
    return clazz.hasAnnotation(RunWith.class)
        || clazz.hasAnnotation(Test.class);
  }

}
